@article{maskguidedfeatureextractionand,
  title = {Mask-Guided Feature Extraction and Augmentation for Ultra-Fine-Grained Visual Categorization},
  author = {Zicheng Pan and Xiaohan Yu and Miaohua Zhang and Yongsheng Gao},
  year = {2021},
  eprint = {2109.07755},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2109.07755v1},
}